Consolidated Statement of Cash Flows - USD ($)	6 Months Ended
	Jun. 30, 2015		Jun. 30, 2014
Operating Activities
Net income	$ 2,048,000,000		$ 2,112,000,000
Adjustments to reconcile net income to net cash provided (used) by operating activities
Provision for credit losses (benefit)	100,000,000		166,000,000
Depreciation and amortization	530,000,000		476,000,000
Deferred income taxes	109,000,000		104,000,000
Net gains on sales of securities	(50,000,000)		(4,000,000)
Changes in fair value of mortgage servicing rights	43,000,000		250,000,000
Gain on sales of Visa Class B common shares	(79,000,000)		(116,000,000)
Undistributed earnings of BlackRock	(196,000,000)		(193,000,000)
Excess tax benefits from share-based payment arrangements	(27,000,000)		(36,000,000)
Net change in
Trading securities and other short-term investments	(22,000,000)		839,000,000
Loans held for sale	(391,000,000)		(99,000,000)
Other assets	22,000,000		(262,000,000)
Accrued expenses and other liabilities	(186,000,000)		381,000,000
Other	(272,000,000)		(148,000,000)
Net cash provided (used) by operating activities	1,629,000,000		3,470,000,000
Sales
Securities available for sale	2,402,000,000		3,359,000,000
Loans	958,000,000		1,295,000,000
Repayments/maturities
Securities available for sale	3,933,000,000		3,434,000,000
Securities held to maturity	1,054,000,000		992,000,000
Purchases
Securities available for sale	(9,706,000,000)		(3,608,000,000)
Securities held to maturity	(3,049,000,000)
Loans	(355,000,000)		(369,000,000)
Net change in
Federal funds sold and resale agreements	(119,000,000)		459,000,000
Interest-earning deposits with banks	(2,190,000,000)		(4,741,000,000)
Loans	(1,017,000,000)		(6,837,000,000)
Other	(394,000,000)		(266,000,000)
Net cash provided (used) by investing activities	(8,483,000,000)		(6,282,000,000)
Net change in
Noninterest-bearing deposits	3,909,000,000		723,000,000
Interest-bearing deposits	3,580,000,000		928,000,000
Federal funds purchased and repurchase agreements	(1,320,000,000)		(1,156,000,000)
Commercial paper	(158,000,000)		(268,000,000)
Other borrowed funds	712,000,000		(494,000,000)
Sales/issuances
Federal Home Loan Bank borrowings	2,250,000,000		7,650,000,000
Bank notes and senior debt	4,932,000,000		3,636,000,000
Subordinated debt			745,000,000
Commercial paper	1,393,000,000		4,532,000,000
Other borrowed funds	586,000,000		380,000,000
Common and treasury stock	109,000,000		179,000,000
Repayments Maturities Financing [Abstract]
Federal Home Loan Bank borrowings	(62,000,000)		(5,539,000,000)
Bank notes and senior debt	(2,134,000,000)		(2,200,000,000)
Subordinated debt	39,000,000		22,000,000
Commercial paper	(3,274,000,000)		(4,262,000,000)
Other borrowed funds	(1,532,000,000)		(354,000,000)
Preferred stock redemption	(500,000,000)
Excess tax benefits from share-based payment arrangements - financing	27,000,000		36,000,000
Acquisition of treasury stock	(1,020,000,000)		(291,000,000)
Preferred stock cash dividends paid	(115,000,000)		(115,000,000)
Common stock cash dividends paid	(516,000,000)		(491,000,000)
Net cash provided (used) by financing activities	6,906,000,000		3,661,000,000
Net Increase (Decrease) In Cash And Due From Banks	52,000,000		849,000,000
Cash and due from banks at beginning of period	4,360,000,000	[1]	4,043,000,000
Cash and due from banks at end of period	4,412,000,000	[1]	4,892,000,000
Supplemental Disclosures
Interest paid	503,000,000		418,000,000
Income taxes paid	191,000,000		551,000,000
Income taxes refunded	1,000,000		9,000,000
Non-cash Investing and Financing Items
Transfer from (to) loans to (from) loans held for sale, net	3,000,000		390,000,000
Transfer from loans to foreclosed assets	$ 227,000,000		$ 315,000,000

[1] Amounts represent the assets or liabilities of consolidated variable interest entities (VIEs).